Watson described the purpose of psychology as: âTo predict, given the stimulus, what reaction will take place; or, given the reaction, state what the situation or stimulus is that has caused the reactionâ (1930, p. 11). * All behavior is learnt from the environment.
Additional tests including penetration,solubility, and ductility are made on the residue. Cutback asphalt grades and tests There are several grades for each of the three types ofcutbacks â rapid curing (RC), medium curing (MC), andslow curing, (SC). The grades include 70, 250, 800, and3000.
NAPA estimates an average asphalt density of 145 pounds per cubic foot, or 3,915 pounds per cubic yard. For example, if your calculated volume is 25 cubic yards, multiplying 25 by 3,915 will give you an asphalt weight per cubic yard of 97,875 pounds, or about 49 tons.